Last week’s development regarding Mets pitcher Dave Williams prompted this week’s development with Chan Ho Park.

Yesterday the Mets signed Park, a right-hander, agreeing to a one-year major-league deal for $600,000 plus a possible $2.4 million in incentives, according to a person familiar with the contract.

The pitcher’s agent, Jeff Borris, said Park is a leading contender for the middle of the Mets’ rotation, telling The Post, “He’s penciled in right now as their No. 3 starter.”

Borris said he had received that impression from the Mets. That spot seems ambitious; Park, who will turn 34 in June and was the first Korean to appear in a major-league game, will be one of nine pitchers competing for three spots in the rotation.

According to a person familiar with the situation, the Mets’ pursuit of Park came about after Williams, who was going to contend for a starting spot, had surgery for a herniated disc in his neck. Last week, Williams’ agent, David Pepe, told The Post the pitcher could need three months before he’s ready to pitch in games.

How much the Mets can expect from Park is debatable. Last year with San Diego, he went 7-7 with a 4.81 ERA in 24 games (21 starts). Park’s lowest ERA since 2001 had been 5.46.

But the Mets aren’t paying Park much money, so it’s not a major gamble. One National League executive said yesterday Park “should be a good pickup” based on the dollars.

The executive also said Park “has become more of a finesse pitcher than a power pitcher in years past.” The exec said Park is not exactly steady, that his “velocity really fluctuates from inning to inning,” that the pitcher is “still inconsistent from start to start” and “at times pitches like a front-end-of-the-rotation starter and other times looks like a spot starter at best.”

Borris said the Mets’ rotation openings, as well as the caliber of the club, were why the move made sense for his client.

“He needed an opportunity to be in the rotation for an entire season,” Borris said, “be on a team that has a great bullpen, will score runs and play defense behind him. And I think the Mets have all those ingredients.”

GM Omar Minaya said in a statement that Park provides “another option to consider as we put together our rotation.”

Park, who is from Kong Ju City in South Korea, will compete with John Maine, Oliver Perez, Mike Pelfrey, Philip Humber, Jason Vargas, Jorge Sosa, Aaron Sele and Alay Soler for a rotation slot.

Park has had good success at Shea Stadium, with a 2.92 ERA in six games (three starts) there, though he hasn’t pitched in Flushing since 2001.